Where: Logan County, Oklahoma (36.0° N, 97.6° W: paleocoordinates 3.5° N, 26.5° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Hennessey Formation, Kungurian (279.5 - 272.5 Ma)

• Stovall (1950) states that the fossil comes from the Hennessey shale. Heaton (1979, Oklahoma Geol. Surv. Bull. 127), however, assigns the locality to the uppermost part of the Garber Sandstone. Both units are correllated with the Clear Fork Group of North Texas by Heaton (1979). The base and top of the Clear Fork Group are both within the Kungurian: see Wardlaw 2005 (Permophiles) for the base, and DiMichele et al. 2001 (J Paleont) for the top. Original chronostratigraphic entry >>Leonardian<< is replaced by >>Kungurian<< (TL).

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; hematitic siliciclastic sediments

Size class: macrofossils

Collected in 1939

Collection methods: mechanical,

Primary reference: J. C. Bruner. 1991. A Catalogue of Type Specimen of Fossil Vertebrates in the Field Museum of Natural History. Fieldiana: Geology (22) [J. Mueller/J. Dummasch/J. Dummasch] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 79602: authorized by Johannes Mueller, entered by Jana Dummasch on 14.03.2008, edited by Torsten Liebrecht